Thread: welding question

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i use to fix the turbo buick v6 Gm headers with mild steel mig used 75/25 mix turned up the heat abit more the type 4series magnetic stain less steel can be mild steel welded did it many times with a mig but in time steel can rot out . strait argon will make more heat in weld . an can under cut in weld fillet in a mig machine using mild steel filler wire . it never made a cleaner weld out of the one machine snap on industrial i had at the time. you can ask about a tri mix at the welding shop for the mig i think its called stargon trade name . now i weld every thing with the tig were i use 347 filler rod for welding stain less steel for EX and that would be for 4 series or 3s like 308 or any of the 3 series stain less steel .using 347 filler will cut down intergranular corrosion creep on a EX can be a problem. with Tig i use only Argon for this welding of this type base metal and mild steel as the tig machine is a different animal then a mig .i do use a gas mix with the tig of helium and argon for aluminum work . i use solar flux if needed on SS steel . i used anti spatter jell or spray with mig. happy welding